Fabric slitting machine



May 11, 1948.

G. ZlEL-INSKI FABRIC SLITTING MACHINE Filed April 11, 1946 2 Sheets-Sheet 1 GEORGE ZIELINSKI l N VEN TOR.

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ATTORNEY y 11, 3- e. zuzunsx:

' FABRIC SLITTING MACHINE Filed April 11, 1946 2 She'ets-Sheet 2 l I i I I l l l l I I I l I I I Fll|l|l||l|| III II. II ll lFllllll *liillo GEORGE ZIELINSKI IN V EN TOR.

A TTORNE Y Fatented May 11, 1%48 pairs!) STATES E T oFF ICE 2,441,378 FABRIC SLITTING- MACHINE George Zielinsliii Brooklyn, -N.-Y. Application April 11, 1946, sen-arm. 661,231

' 1 Claim. (01.164 60) 1 This invention relates to a rotary knife cutting machine for slitting fabric usually having a preformed slitting line formed therein and comprising a transparent guard for the knife whereby the fabric being slit is visible, through the guard at the point of slitting to enable the operator to closely and safely follow the slitting of the fabric.

An object of this inventionisto provide-a rotary knife cutting machine comprising a hollow casing including a table having a narrow through slot, and to mount a rotary disc-shaped knife below the table with a portion thereof extending through the slot above the table, the machine comprisinga grooved and elongated transparent guard fixed to the table rearwardly of the rotary knife, the lower surface at the front portion of the guard being in spaced relation above the table to permit fabric being: slit to be fed under the guard and along the entire exposed portion of the knife, and whereby the fabric being slit is visible through the guard toenable the operator to accurately slit the fabric while botiihands of the oper ator are kept on opposite sides of the guard and away from the knife.

Another object of this invention is to provide a pivotal mounting for the transparent guard, the mounting being at the rear portion of the guard and whereby the guard, in its entirety, can pivot or swing upwardly away from the table to increase the spaced relation between the lower surface of the guard and the upper surface of the table, so as to permit layers of fabric of considerable thickness to be fed under the guard to the knife.

With the above and other objects in view, the invention will be hereinafter more particularly described, and the combination and arrangement of parts will be shown in the accompanying drawings and pointed out in the claims which form part of this specification.

Reference will now behad to the drawings, wherein like numerals of reference designate corresponding parts throughout the several views, in which:

Figure 1 is a top plan view of the slitting machine.

Figure 2 is a cross-sectional view, the section being taken as on line 22 in Figure 1;

Figure 3 is an enlarged fragmentary bottom view of the rear end portion of a modified guard, showing the guard cut to form guideway means facing in opposite directions away from the knife.

Figure 4 is a side elevation'of a modified guard which is pivotally mounted at its rear portion.

Figure 5 is a top plan view of the modified guard shown in Figure 4'.

Figure 6 is a fragmentary cross-sectional view of'the guard shown in'Figures 4' and 5, the sectiio'n being taken as oniline 6 6 in'Figure 5.

In the illustrated embodiment of the invention, the numeral Iii indicates a; slitting machine comprising: a hollow casing H, terminating at its upper end in a work supporting table [2.

T Eotatably mounted inthe casing ii is a rotary disk-shaped knife [3 mounted on a shaft i4", carried by'a. bearing l5. The bearing i5 is integral with a platefifi which is suitably fixed on upright walls "t'ijl'li forming part of the casing H.

1 The shaft M is suitably mounted below the table Il2i so that only a. portion of the knife 83 eXt'end'saboVe the. table. For this purpose the table [2 has a narrow through slot i9 extending lengthwise of the table [2.

, The table i2 is fixed to the plate it by screws ZiLJ'A. pulley Z]; is suitably fixed to the free end bfIth'e shaft" M The. pulley 2| is connected by a belt; 22; with a'plill'ey 23 carried by a motor .241-v?hichis'..suitably supported in the casing. H,

The motor 21' and'the b'elt'ZZ' serve as means for driving the shaft [4.

An elongated hollow knife guard 25 has its rear portion fixed to the table I2 by screws 26. The lower surface of the knife guard 25 is cut away at its front portion 21 so as to be in spaced relation above the table [2. This provides an opening 28 between the lower surface of the guard and the upper surface of the table to permit fabric being slit to pass through the opening 28 while supported on the table [2. The operators hands are shielded on both sides of the guard while the fabric is fed to the disk-shaped knife 13.

For the purpose of this invention, which is to accurately slit a piece of fabricof considerable length, the knife guard is made of transparent plastic material, whereby the fabric being slit is visible through the guard to enable the operator to slit the fabric while both hands of the operator are kept away from the knife by the guard. It is to be noted that the knife guard 25 has an arcuate opening 29 into which the rotary disc-shaped knife 53 extends, the opening 29 being suificient to provide a clearance space around the upper periphery of the knife.

Figure 3 shows a modified knife guard as wherein the lower rear portion of the guard at the opening 28 is cut away in opposite directions to provide guideway means 3| These guideway means facilitate the automatic spreading of the slit fabric in opposite directions clear of the guard 33.

3 This increases the speed with which the operator can perform accurate slitting operations.

Figures 4, 5 and 6 show a modified knife guard 35, which is improved by pivotally mounting its rear end portion on a pin 36 in a housing 31. For

tending arm 43 of the insert 38 and forces theextension 49 into contact with the table I2. I

When layers of fabric of considerable thickness are fed under the guard 35, the front portion of the guard swings upwardly and permits passage of the fabric under the guard.

As shown in Figure 2, an electric switch 45 is mounted on the table l2. The switch is connected by an electric conducting wire 46 to a connecting box 41 on the motor 24. An electric conducting wire 48 leads from the connecting box to an outlet plug 49.

It is to be noted that the modified knife guard 30 also has an arcuate opening 29. Also that the entire shaded area around the opening 29 lies in a single plane higher than the lower surface in which are screw holes 32 for the screws 26.

In accordance with the patent statutes I have described and illustrated the preferred embodiment of my invention, but it will be understood that various changes and modifications can be made therein without departing from the spirit of the invention as defined by the appended claim.

I claim:

In a machine for slitting fabric, comprising a table, a rotary disk-shaped knife mounted on a shaft below said table, said table having a narrow through slot permitting a portion of said knife to project above said table, an elongated hollow 4 knife guard having its rear portion fixed to said table rearwardly of said upwardly projecting portion of said rotary knife, said guard having a circumferentially shaped groove housing said knife, the lower surface at the front portion of said guard being in spaced relation above said table to permit fabric being slit to be fed underneath said guard and past said knife on both sides thereof, said knife guard being made of transparent material, whereby the cloth being slit is visible through said guard at the point of slitting,

said guard being of sufllcient width to keep both hands of the operator away from said knife during said slitting operation, said housing being pivotally mounted at its rear portion, and sprin means at said rear portion causing the forward portion of said guard to be resiliently down pressed,while the lower surface of the front portion of said guard is in spaced relation above said table.

GEORGE ZIELINSKI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,167,435 Robertson et a1 Jan. 11, 1916 1,433,799 Caywood Oct. 31, 1922 1,622,053 Roundo Mar. 22, 1927 1,729,510 Fleischer et a1 Sept. 24, 1929 1,821,716 Kusiv Sept. 1, 1931 1,851,667 Freeman Mar. 29, '1932 1,998,245 Laukhuff Apr. 16, 1935 2,129,448 Short Sept. 6, 1938 2,185,094 Randall Dec. 26, 1939 2,376,460 Strandberg May 22, 1945 2,380,267 Ruth July 10, 1945 FOREIGN PATENTS Number Country Date 11,709 Great Britain May 29, 1908 

